379 Immune infiltrates are associated with clinical outcomes in patients with resectable soft tissue sarcoma (STS) treated with neoadjuvant immune checkpoint blockade (ICB) by Heather Lin, Wei-Lien Wang, Jennifer Wargo, Neeta Somaiah, Ignacio Wistuba, Edwin Parra, Elise Nassif, Grace Mathew, Alexander Lazar, Andrew Bishop, Emily Keung, Cibelle Lima, Ashleigh Guadagnolo, Valerae Lewis, Keila Torres, Kelly Hunt, Barry Feig, Christopher Scally, Ahmed Al Rawi, Shadarra Crosby, Davis Ingram, Khalida Wani, Christina Roland